-Topic Sentence: Global warming is the result of the Greenhouse effect, the process of absorbing and radiating heat. The Greenhouse effect involves four steps.
*Step 1: Incoming Solar Radiation
-Short wavelength, high energy heat from the sun.
-Solar radiation passes atmosphere, only small % reaches earth’s surface because gases & particles absorb or energy from going through.
- The solar radiation that reaches the earth heats surface & generates terrestial heating during the day *Step 2: Daytime Terrestrial Heating
-Influenced by many factors: altitude of sun (greater alt., more heating) color of surface (dark colors absorb more heat, white=absorbs less)
-Surface acts as a heat collector
-the absorbed heat is retransmitted at night, terrestrial radiation
*Step 3: Nighttime terrestrial heating
-Earth releases heat back into the atmosphere at night
-Long wavelength, low energy
-Normal levels of greenhouse gas prevent some of the heat from escaping to space.
*Step 4: the Greenhouse Gases
-concentration of greenhouse gases (methane, carbon dioxide, nitrous oxide, water vapor, CFCs) increased, preventing nighttime terrestrial radiation from escaping during the night. Hence, warming the atmosphere.
Paragraph 2: Evidence that global temp. is increasing
Topic Sentence: It is true that global heating is occurring, and there is evidence to support it.
-Human generation of CO2 from burning fossil fuel outpaces the earths ability to swallow it up; hasnt had this much CO2 for hundreds of years,
-Intergovernmental Panel on Climate Change global temp has gone up 1 degree F. since late 19th century.
-Sea levels have gone up 6 inches over the past century
-Glaciers have receeded.
-If kept up, planet temp could rise another 2-7 degrees
-Appears to be unrealted to natural fluctuation of temp
Paragraph 3: Evidence that global warming is not occuring
Topic Sentece: However, there is other evidence that global warming is not occuring at all.
-Satellite data shows that since 1979, no warming occured, slight cooling
-Warming isnt in sync with the rise in greenhouse gases, global surface temp rose between 1915 and 1940, then leveled off before rising again in 1970. warming due to post-war emissions.
-Global climate change cannot be measured in labs. Models are wrong.
Paragraph 4: Negative Effects
-Crops and human health storm severity , developed and undeveloped countries
SCIENCE PAGE - ESSAY- FOR APRIL 27TH
Paragraph 1: Four Steps of the Greenhouse Effect-Topic Sentence: Global warming is the result of the Greenhouse effect, the process of absorbing and radiating heat. The Greenhouse effect involves four steps.
*Step 1: Incoming Solar Radiation
-Short wavelength, high energy heat from the sun.
-Solar radiation passes atmosphere, only small % reaches earth’s surface because gases & particles absorb or energy from going through.
- The solar radiation that reaches the earth heats surface & generates terrestial heating during the day
*Step 2: Daytime Terrestrial Heating
-Influenced by many factors: altitude of sun (greater alt., more heating) color of surface (dark colors absorb more heat, white=absorbs less)
-Surface acts as a heat collector
-the absorbed heat is retransmitted at night, terrestrial radiation
*Step 3: Nighttime terrestrial heating
-Earth releases heat back into the atmosphere at night
-Long wavelength, low energy
-Normal levels of greenhouse gas prevent some of the heat from escaping to space.
*Step 4: the Greenhouse Gases
-concentration of greenhouse gases (methane, carbon dioxide, nitrous oxide, water vapor, CFCs) increased, preventing nighttime terrestrial radiation from escaping during the night. Hence, warming the atmosphere.
Paragraph 2: Evidence that global temp. is increasing
Topic Sentence: It is true that global heating is occurring, and there is evidence to support it.
-Human generation of CO2 from burning fossil fuel outpaces the earths ability to swallow it up; hasnt had this much CO2 for hundreds of years,
-Intergovernmental Panel on Climate Change global temp has gone up 1 degree F. since late 19th century.
-Sea levels have gone up 6 inches over the past century
-Glaciers have receeded.
-If kept up, planet temp could rise another 2-7 degrees
-Appears to be unrealted to natural fluctuation of temp
Paragraph 3: Evidence that global warming is not occuring
Topic Sentece: However, there is other evidence that global warming is not occuring at all.
-Satellite data shows that since 1979, no warming occured, slight cooling
-Warming isnt in sync with the rise in greenhouse gases, global surface temp rose between 1915 and 1940, then leveled off before rising again in 1970. warming due to post-war emissions.
-Global climate change cannot be measured in labs. Models are wrong.
Paragraph 4: Negative Effects
-Crops and human health storm severity , developed and undeveloped countries